Define measurement. why is it important in our life?
Answers
Answer:
Measurements are so often taken for granted we sometimes do not appreciate the grand importance measurements play in our lives. On a baseline level, measurements fall into the categories of weight, area, volume, length and even temperature. While we look at these various categories as stoic forms of mathematical measurements a closer examination of things we do in everyday life reveals their clear importance.
Explanation:
Measurements provide structure and remove the chaos that would result without any congruent method of understanding weight, mass, temperature, etc.
Answer:
The comparison of unknown physical quantity with the known standard quantity of the same kind is called measurement.
Measurements play an important role in daily life because they are useful to do basic tasks, such as take a child's temperature with a thermometer, make time estimations, measure out medicine and find weights, areas and volumes of different materials or substances.
Hope it helps you.Related Questions
adipic+acid+contains+49.32%+c,+43.84%+o,+and+6.85%+h+by+mass.+what+is+the+empirical+formula?
Answers
The ratio of atoms determines the empirical formula of adipic acid. As a result, C₂H₂O is the empirical formula for adipic acid.
To determine the empirical formula of adipic acid based on the given percentages of carbon (C), oxygen (O), and hydrogen (H) by mass, we need to convert these percentages into moles and then find the simplest whole number ratio.
Assume we have 100 grams of adipic acid. This assumption allows us to directly convert the percentages into grams.
Mass of C = 49.32 g
Mass of O = 43.84 g
Mass of H = 6.85 g
Convert the masses of each element into moles by dividing by their respective molar masses:
Molar mass of C = 12.01 g/mol
Molar mass of O = 16.00 g/mol
Molar mass of H = 1.01 g/mol
\(\text{Moles of C} = \frac{{49.32 \, \text{g}}}{{12.01 \, \text{g/mol}}} \approx 4.107 \, \text{mol}\)
\(\text{Moles of O} = \frac{{43.84 \, \text{g}}}{{16.00 \, \text{g/mol}}} \approx 2.740 \, \text{mol}\)
\(\text{Moles of H} = \frac{{6.85 \, \text{g}}}{{1.01 \, \text{g/mol}}} \approx 6.792 \, \text{mol}\)
Determine the simplest whole number ratio of the moles by dividing each mole value by the smallest mole value:
\(\text{Moles of C} = \frac{{49.32 \, \text{g}}}{{12.01 \, \text{g/mol}}} \approx 4.107 \, \text{mol}\)
\(\text{Moles of O} = \frac{{43.84 \, \text{g}}}{{16.00 \, \text{g/mol}}} \approx 2.740 \, \text{mol}\)
\(\text{Moles of H} = \frac{{6.85 \, \text{g}}}{{1.01 \, \text{g/mol}}} \approx 6.792 \, \text{mol}\)
Round the mole ratios to the nearest whole number:
Moles of C ≈ 2
Moles of O ≈ 1
Moles of H ≈ 2
The empirical formula of adipic acid is determined by the ratio of atoms. Therefore, the empirical formula of adipic acid is C₂H₂O.
Note: The molecular formula of adipic acid may be a multiple of the empirical formula, indicating a higher number of atoms in the actual molecule.
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in order to increase the amount of nh3 produced at equilibrium, do you need to increase or decrease the amount of n2 in the reactor? explain your reasoning.
Answers
Yes, to increase the amount of NH\(_{3}\) produced at equilibrium, you need to increase the amount of N\(_{2}\) in the reactor.
According to Le Chatelier's principle, when a system at equilibrium is subjected to a change, it will shift in a direction that minimizes the effect of that change. In the reaction where NH\(_{3}\) is produced from N\(_{2}\) and H\(_{2}\), increasing the amount of N\(_{2}\) in the reactor will increase the concentration of N\(_{2}\).
As a result, the equilibrium will shift in the forward direction to consume the excess N\(_{2}\) and produce more NH\(_{3}\) to restore equilibrium. Therefore, increasing the amount of N\(_{2}\) in the reactor will favor the forward reaction and increase the amount of NH\(_{3}\) produced at equilibrium.
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For each alcohol reaction, give the major organic product. Draw the product of reaction A HBr A OH
Answers
For reaction A, HBr: major organic products is alkene (CH₂=CH₂)
For reaction A, OH: major organic products is alkene (CH₂=CH₂)
How to determine major organic products?Reaction A:
The reaction of an alcohol with hydrogen bromide (HBr) in the presence of a strong acid catalyst, such as sulfuric acid (H₂SO₄), is an example of an acid-catalyzed dehydration reaction. The major organic product in this reaction is an alkene.
For example, if we react ethanol (CH₃CH₂OH) with HBr in the presence of concentrated sulfuric acid, the major organic product is ethene (CH₂=CH₂).
CH₃CH₂OH + HBr → CH₂=CH₂ + H₂O
Reaction A:
The reaction of an alcohol with a strong base, such as sodium hydroxide (NaOH), is an example of an elimination reaction. The major organic product in this reaction is also an alkene.
For example, if we react ethanol (CH₃CH₂OH) with NaOH, the major organic product is ethene (CH₂=CH₂).
CH₃CH₂OH + NaOH → CH₂=CH₂ + H₂O
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two liquids are poured in a container and mixed. a solid forms and settled to the bottom of the container. what can you conclude?
Answers
When two liquids are poured in a container and mixed, the solid that is formed and settles to the bottom of the container is called a precipitate.
Precipitates formed in a chemical reaction are the solid products of the reaction. They are insoluble in nature and exists as ionic solids. They are so formed by the combination of cations and anions when two different liquids are poured together.
Not all aqueous solution mixtures form precipitates. The extent of precipitation depends on certain factors such as temperature, concentration of solution and buffer solutions used.
The precipitates settle at the bottom of the aqueous solution.
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What's the specific heat of water?
Answers
Answer:
4,186 joules
Explanation:specific heat, the quantity of heat required to raise the temperature of one gram of a substance by one Celsius degree. The units of specific heat are usually calories or joules per gram per Celsius degree. For example, the specific heat of water is 1 calorie (or 4,186 joules) per gram per Celsius degree.
A _______ is a substance used during electrolysis that splits apart and is attracted to an oppositely charged electrode
Answers
Answer:
electrolyte
Explanation:
How much energy does it take to boil 100 mL of water? (Refer to table of constants for water. )
A. 100 mL × 1g divided by 1mL × 1mol divided by 18. 02g × 6. 03 kJ/mol = 33. 5 kJ
B. 100 mL × 1g divided by 1mL × 1mol divided by 18. 02g × (–285. 83 kJ)/mol = –1586 kJ
C. 100 mL × 1g divided by 1mL × 1mol divided by 18. 02g × 40. 65 kJ/mol = 226 kJ
D. 100 mL × 1g divided by 1mL × 1mol divided by 18. 02g × 4. 186 kJ/mol = 23. 2 kJ
Answers
Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.
The correct answer is D. 100 mL × 1g divided by 1mL × 1mol divided by 18.02g × 4.186 kJ/mol = 23.2 kJ
To calculate the energy required to boil 100 mL of water, we need to use the specific heat capacity of water, which is approximately 4.186 J/g·°C. The molar mass of water is 18.02 g/mol.
First, we convert the volume of water from milliliters to grams:
100 mL × 1 g/1 mL = 100 g
Then, we calculate the number of moles of water:
100 g × 1 mol/18.02 g = 5.548 mol
Finally, we multiply the number of moles by the molar heat of vaporization of water, which is approximately 40.65 kJ/mol:
5.548 mol × 4.186 kJ/mol = 23.2 kJ
Therefore, it takes approximately 23.2 kJ of energy to boil 100 mL of water.
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what's the FM of chlorine
Answers
Answer:
The system can operate on a set level of parts per million (ppm) chlorine, where the set level is automatically maintained.
SOMEONE PLEASE HELP! IVE BEEN STUCK ON THIS QUESTION FOR AN HOUR
Answers
ionic van der waal metallic covalent A tsunami wave can occu as the result of an earthquake along which type of tectonic plate boundary? divergent subduction No answer text provided. transform
Answers
A tsunami wave can occur as a result of an earthquake along a subduction tectonic plate boundary. This type of boundary occurs when one tectonic plate is forced beneath another plate.
1. Tsunamis are typically generated by large undersea earthquakes.
2. Subduction plate boundaries are areas where one tectonic plate is forced beneath another plate.
3. When there is a subduction earthquake, the movement of the subducting plate can cause a displacement of water, creating a tsunami wave.
4. The energy released during the earthquake is transferred to the water, causing the wave to propagate across the ocean.
5. Therefore, a tsunami wave can occur as the result of an earthquake along a subduction tectonic plate boundary.
In conclusion, a tsunami wave can occur as the result of an earthquake along a subduction tectonic plate boundary.
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Does light take up space?
Answers
Answer:
no
Explanation:
light is a form of energy so it doent have matter therefore it doent take up sapce
Which of these is most likely to create large areas of land subsidence?
Answers
Please Help!
3/1H + 2/1H → 1/0n + ?
a. 4/4Be
b. 2/1H
c. 3/0n
d. 4/2He
Answers
Answer:
I'm pretty sure the answer Is c because I think I remember doing something like that so yeah
Why are salt and sugar both able to dissolve in water, even though the solutes have different types of chemical bonding? everything can dissolve in water because water is considered a universal solvent. liquid water is cooler than solid salt and sugar, allowing them to dissolve easily. salt's ions and sugar's polar bonds are both attracted to the polar water molecules. small solutes like salt and sugar can fit in the spaces between large water molecules.
Answers
Sucrose and other simple sugars may dissolve in water because they are polar molecules with an unequal charge distribution. Water is also quite polar, capable of forming weak, temporary connections with other polar compounds.
Salt dissolves into ions, with Na being positively charged and CL being negatively charged. Because water is highly polar (parts of the molecule are negatively charged while others are positively charged), the sodium ions are surrounded by water molecules, with the negatively charged component of the water molecules surrounding the NA ion. The Cl ion experiences the inverse effect.
How does salt dissolve in water compared to sugar?A solution's solute and solvent are two different types of substances that can dissolve one another. Different solvents have different levels of solubility for different solutes. For instance, sugar is far more soluble in water than salt. Even sugar, though, has a limit on how much may dissolve.
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Answer: Salt's ions and sugar's polar bonds are both attracted to the polar water molecules.
Explanation:
What is the isotope name of the element that has 9 neutrons?
1)Beryllium-4
2 ) Beryllium-9
3) Fluorine-9
4) Fluorine-19
5)Not enough information to tell
Answers
We do not have enough information to deduce the isotope that would have nine neutrons. Option 5
What is the neutron?The atom is composed of subatomic particles. The subatomic particles that are in the atom are such that we have the electrons that are negatively charged, the protons that are positively charged and the neutrons that are uncharged.
Now, we know that the number of neutrons is obtained as the difference between the mass number and the atomic number of the atom. In this case, we only have the mass numbers and not the atomic numbers thus we do not have sufficient information.
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how to prepare tracrolimus with 0.3etaphil
Answers
Tracrolimus is a medication used to treat certain autoimmune diseases and to help prevent organ transplant rejection.
It is available as an oral capsule, oral solution, and topical ointment. To prepare tracrolimus with 0.3% etaphil, you will need the following supplies:
Tracrolimus capsules or oral solution ;0.3% etaphil ; A mortar and pestle ; A clean, dry container
Instructions:
1. Place the tracrolimus capsule or oral solution in the mortar and pestle.
2. Grind the capsule or solution into a fine powder.
3. Add the 0.3% etaphil to the powder and mix thoroughly.
4. Transfer the mixture to a clean, dry container and seal it tightly.
5. Label the container with the name of the medication, concentration, and date of preparation.
6. Store the prepared tracrolimus in a cool, dry place and use as directed.
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what does Le châteliers principle state?
Answers
Hope this helps!
For the following equilibrium, if the concentration of b− is 8. 3×10−7 m, what is the solubility product for the salt ab?
Answers
The equilibrium equation for the salt AB can be represented as;AB ⇌ a^+ + b^-Ksp= [a^+] [b^-]The solubility product for the salt AB.
Ksp is given by the product of the molar concentration of the two ions raised to their respective powers. For the given equilibrium, the concentration of b^- is 8.3 × 10^-7 M, then the solubility product can be calculated by substituting the concentration of b^- into the equilibrium equation.Ksp = [a^+] [8.3 × 10^-7].Hence, the solubility product for the salt AB can be determined by multiplying the concentration of the ions raised to their respective powers. In this case, the concentration of b^- is 8.3 × 10^-7 M, then the solubility product can be calculated by substituting the concentration of b^- into the equilibrium equation.
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4. The lake water changes color rapidly on exposure to air. Suggest a factor that may affect the
speed of the reaction in Blood Falls. This question is not in the article directly. Give a reasonable
guess, that shows thought and effort.
Answers
A factor that might affect the speed of reaction of the water in Blood Falls is the concentration of iron in the water.
How can the speed of reaction of the lake water be affected ?Blood Falls is located in the McMurdo Dry Valleys of Antarctica, where a subglacial lake with a high concentration of iron mixes with oxygenated seawater to create the characteristic reddish color of Blood Falls.
The speed of this reaction may be influenced by the amount of iron present in the water, as well as the availability of oxygen to react with the iron. If the concentration of iron is high, the reaction may proceed more quickly than if the concentration is lower.
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A compound was found to contain 90.6% lead (Pb) and 9.4% oxygen. What is the empirical formula for this compound?
Answers
Answer:
the answer is 47.9 and ik because I just had that question
The empirical formula of the compound is O₄Pb₃.
What is the empirical formula?
An Empirical system is the chemical system of a compound that offers the proportions of the elements gifted within the compound however not the real numbers or arrangement of atoms. This would be the lowest complete variety ratio of the elements within the compound.
Amount of lead (Pb) = 90.6%
⇒and amount of oxygen = 9.4%
taking the whole number ratio
o = 4
Pb = 3
∴ ⇒O: Pb=4:3
O4Pb3 answer.
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How can the gravitational potential energy of an object be changed?
Answers
Answer:
Gravitational potential energy may be converted to other forms of energy, such as kinetic energy. If we release the mass, gravitational force will do an amount of work equal to mgh on it, thereby increasing its kinetic energy by that same amount (by the work-energy theorem).
Explanation:
why is
helium number 2 (the second element)
and beryllium number 4 (the fourth
element) on the periodic table ?
Answers
Answer:
See note in Explanation
Explanation:
The modern periodic table of the elements is arranged in order of increasing atomic numbers which is also in terms of the number of protons in the nucleus. That is, for any element listed on the periodic table its atomic number equals the number of protons in the nucleus. Thus, the element with 2 protons in its nucleus would be element #2 (Helium), element #3 (Lithium) has 3 protons in its nucleus and element #4 (Beryllium) has an atomic number 4 and contains 4 protons in its nucleus.
Also, this arrangement of elements finds that elements below elements 2, 3 & 4, Neon #10; sodium #11 & magnesium #12 have similar chemical and physical properties as does elements #2, #3 & #4. Such gives rise to the 'Periodic Law' => the chemical and physical properties of the elements is a periodic function of their atomic number (or, number of protons in the nucleus).
A combustion reaction occurs between one molecule of methane (CH4) and two molecules of oxygen (O,)
A 1 carbon, 4 hydrogen, and 2 oxygen
B 1 carbon, 4 hydrogen, and 4 oxygen
C 1 carbon, 1 hydrogen, and 1 oxygen
D 1 carbon, 1 hydrogen, and 2 oxygen
Answers
Answer:
D
Explanation:
Because I carbon atom and 1 hydrogen atom plus 2
Oxygen atoms are needed
Two solid blocks are HEATED to the temperatures show. The blocks are placed so they touch. Which diagram shows the DIRECTION HEAT WILL FLOW?
Answers
Answer:
Heat flows from the block at high temperature to the one with lower temperature
Explanation:
The direction of heat flow is from a body at higher temperature to one with a lower temperature.
Temperature gradient determines the way and manner in which heat is dissipated. As a system tend to increase entropy, it ensures that heat moves from hotter body to a colder body. Heat movement here is by conduction as the body touches. When both bodies reaches the same temperature, thermal equilibrium is established.Answer:
the answer options C
170 C no heat flow
Explanation:
the+yield+to+maturity+of+a+bond+with+a+6.8%+coupon+rate,+semiannual+coupons,+and+two+years+to+maturity+is+8.9%+apr,+compounded+semiannually.+what+is+its+price?
Answers
The price of the bond is $1683.27. The price of a bond can be calculated using the present value of its cash flows. The present value of the coupon payments and the present value of the principal payment are added together to obtain the price of the bond.
Since it is a bond with a semiannual coupon, the number of periods will be double the maturity period (in years). Hence, the number of periods is 4.
Hence, the semiannual coupon rate is given as: Semiannual coupon rate = Annual coupon rate / 2 = 6.8% / 2 = 3.4% The time to maturity is 2 years, and the bond pays semiannual coupons, so the number of periods is 4. The yield to maturity is given as 8.9% APR, compounded semiannually.
Therefore, the semiannual yield is given as: Semiannual yield to maturity = APR / 2 = 8.9% / 2 = 4.45% Using the formula for the present value of a bond, the price of the bond can be calculated.
The formula is given as: P = C * [(1 - (1 / (1 + r)^n)) / r] + FV / (1 + r)^n; where, P = price of the bond C = coupon payment r = yield to maturity / 2 (semiannual yield) n = number of periods FV = face value of the bond P = C * [(1 - (1 / (1 + r)^n)) / r] + FV / (1 + r)^n P = 3.4% * 1000 * [(1 - (1 / (1 + 4.45%)⁴)) / (4.45%)] + 1000 / (1 + 4.45%)⁴ P = 897.25 + 786.02 P = 1683.27
The price of the bond is $1683.27. Therefore, the price of the bond is $1683.27.
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How many moles are in 3.27 x 1027 atoms of carbon (C)?
Answers
Answer:
Try:
1. How many atoms are in 6.5 moles of zinc?
6.5 moles 6.02 x 1023 atoms = 3.9 x 1024 atoms
1 mole
2. How many moles of argon are in a sample containing 2.4 x 1024 atoms of argon?
2.4 x 1024 atoms of argon 1 mole = 4.0 mol
6.02 x 1023 atoms
3. How many moles are in 2.5g of lithium?
2.5 grams Li 1 mole = 0.36 mol
6.9 g
4. Find the mass of 4.8moles of iron.
4.8 moles 55.8 g = 267.84 g = 270g
1 mole
Explanation:
i think i did it about right..?? :-(
Is 4Na2CO3 a mixture why or why not?
Answers
Answer:
In the United States today, no federal law prohibits human cloning, either for purposes of reproduction or for purposes of biomedical research.
Explanation:
1. a) Draw and label the apparatus you could use to separate a mixture of ethanol and water.
b) What is this method of separation called?
2. Explain why you would be able to collect a more concentrated sample of ethanol from a mixture of water and ethanol using the apparatus drawn in question 1 than by using simple distillation.
Answers
Answer:
the method is fractional distillation
1) a) The apparatus that can be used to separate a mixture of ethanol and water is called a fractional distillation apparatus. It consists of the following components:
b) The method of separation used in this apparatus is called fractional distillation.
2) In fractional distillation, the fractionating column provides additional surfaces for the vaporized components to condense and revalorize.
Distillation flask: This is a round-bottomed flask where the mixture of ethanol and water is initially placed.
Fractionating column: A long column with several glass beads or plates. It provides a large surface area for the vaporized components to condense and revalorize, aiding in the separation process.
Thermometer: It is placed at the top of the fractionating column to monitor the temperature during the distillation process.
Condenser: It is a coiled glass tube connected to the fractionating column. Cold water flows through the condenser, causing the vaporized components to condense back into liquid form.
Receiver flask: This is where the separated components are collected. The receiver flask is placed at the end of the condenser.
b) The method of separation used in this apparatus is called fractional distillation. Fractional distillation is employed when the components of a mixture have similar boiling points. In the case of ethanol and water, they form an azeotropic mixture with a boiling point of around 78.2°C. Simple distillation would not effectively separate these two components because they would boil together and vaporize simultaneously.
In fractional distillation, the fractionating column provides additional surfaces for the vaporized components to condense and revaporize. This repeated condensation and revalorization process allows for more efficient separation. The higher surface area in the fractionating column helps to achieve better separation of the ethanol and water, resulting in a more concentrated sample of ethanol in the distillate collected in the receiver flask.
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Nitrogen flows at steady state through a horizontal, insulated pipe with inside diameter of 1.5(in). A pressure drop results from flow through a partially opened valve. Just upstream from the valve the pressure is 100(psia), the temperature is 120(degree F), and the average velocity is 20(ft)(s)^-1. If the pressure just downstream from the valve is 20(psia), what is the temperature? Assume for nitrogen that PV/T is constant, C_V = (5/2) R, and C_P = (7/2) R. (Values for R are given in App. A.)
Answers
Answer:
To solve this problem, we can apply the ideal gas law and the energy equation for an adiabatic process. Let's denote the initial conditions (upstream) as subscript 1 and the final conditions (downstream) as subscript 2.
Given:
- Pressure upstream (P1) = 100 psia
- Temperature upstream (T1) = 120 °F
- Velocity upstream (V1) = 20 ft/s
- Pressure downstream (P2) = 20 psia
- Specific heat capacity at constant volume (Cv) = (5/2)R
- Specific heat capacity at constant pressure (Cp) = (7/2)R
First, let's convert the given temperatures from Fahrenheit to Rankine:
T1_Rankine = (120 + 460.67) °R
Next, we'll use the ideal gas law (PV = nRT) to find the ratio of the temperatures (T2/T1) using the pressure ratio (P2/P1):
(P2/P1) = (T2/T1)
Let's calculate the temperature ratio (T2/T1):
T2_Rankine = (P2/P1) * T1_Rankine
Now, let's use the energy equation for an adiabatic process to relate the temperature and velocity changes:
(T2/T1) = (V2/V1)^2 * (Cp/Cv)
We're given the velocity upstream (V1), and we know that the diameter of the pipe is constant, so the velocity downstream (V2) can be related to the pressure ratio:
(V2/V1) = sqrt(P1/P2)
Let's calculate the velocity ratio (V2/V1):
V2_V1 = sqrt(P1/P2)
Finally, we can solve the equation (T2/T1) = (V2/V1)^2 * (Cp/Cv) for T2:
T2_Rankine = (V2_V1)^2 * (Cp/Cv) * T1_Rankine
Now, let's substitute the given values and calculate T2:
T2_Rankine = (sqrt(P1/P2))^2 * (Cp/Cv) * T1_Rankine
= (sqrt(100/20))^2 * ((7/2)(5/2)) * T1_Rankine
T2_Rankine = 49/4 * (7/2)(5/2) * T1_Rankine
Now, substitute T1_Rankine and calculate T2:
T2_Fahrenheit = T2_Rankine - 460.67
= [(49/4)(7/2)(5/2) * T1_Rankine] - 460.67
Therefore, the temperature downstream (T2) is T2_Fahrenheit °F.
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Researchers stationed at different areas on a mountain and in a tunnel midway through the mountain boiled water at the same time. Even though the water at every station was at the same temperature, the pot on the top of the mountain started boiling before the others. Why?
Answers
The phenomenon observed, where water at the top of the mountain started boiling before the water at lower stations, can be attributed to the difference in atmospheric pressure at various elevations.
Atmospheric pressure decreases with increasing altitude. The pressure exerted by the atmosphere affects the boiling point of a liquid. As the pressure decreases, the boiling point of a substance also decreases.
This is because boiling occurs when the vapor pressure of the liquid equals the atmospheric pressure. When the atmospheric pressure decreases, the vapor pressure required for boiling is reached at a lower temperature.
On top of the mountain, where the atmospheric pressure is lower, the boiling point of water is lower compared to the stations at lower elevations.
Therefore, even if the water at each station was at the same initial temperature, the water at the top of the mountain reached its boiling point first because the lower atmospheric pressure allowed the vapor pressure to be achieved at a lower temperature.
In contrast, the stations located at lower elevations experience higher atmospheric pressure, requiring a higher temperature to reach the boiling point of water. Hence, the water at these stations takes longer to reach the boiling point compared to the water at the top of the mountain.
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